Snap hook



FIG. 1 is a perspective view of a snap hook showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left end view thereof;

FIG. 5 is a right end view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a top view thereof. 

The ornamental design for a snap hook, as shown and described. 